Night-time water restrictions will come into force in many areas of Dublin tonight.
Bray will also be impacted by the measures, which come into effect at 10pm.
The measures are expected to last at least one week, with water pressure set to be reduced between 10pm and 5am.
That's in addition to restrictions already in place in some schemes around the country, as well as the nationwide hosepipe ban.
It's hoped the move will help avoid widespread outages in the autumn.
The restrictions are described as 'level 2' - meaning there will be no loss of supply, but people in some high ground or remote areas may see tap water reduced to a trickle.
Irish Water say the decision to lock down the restrictions to these areas was not taken lightly.
Any customers adversely affected by the measure can call the Irish Water Customer Care line on 1850 278 278.
You can find a full list of affected areas below:
- City Centre North and South